logic-lock

MySQL logic locks implemented over sea-orm

Locking

Lock::build takes a key, any owned connection, so it can be a sea-orm::DatabaseConnection, a sea-orm::DatabaseTransaction or another Lock himself, and an optional timeout in seconds, defaulting to 1 second. In case of error, the owned connection is returned alongside the database error, if any, this way the connection isn't automatically dropped. Lock himself acts as a connection, so you can use it everywhere you would have used the original connection.

let lock = logic_lock::Lock::build("my_lock_key", conn, None).await.unwrap();

Unlocking

Since MySQL logic locks lives in the session, not in a transaction like table locks, a not-dropped lock will live as long as the connection, and if a connection is part of a connection pool, this can be a really long time. To release a Lock simply use the Lock::release method. On success it will return the original connection, on error it will return the Lock himself alongside with the database error, if any.

let conn = lock.release().await.unwrap();

Drop

Dropping a locked Lock will log an error. It has been chosen to not panic to avoid cases of panic-while-panicking.